<template>
  <div class="recommend" ref="recommend">
    <scroll ref="scroll" :data="discList" class="recommend-content">
      <div>
        <div v-if="recommends.length" class="slider-wrapper" ref="sliderWrapper">
          <slider>
            <div v-bind:key="item.id" v-for="item in recommends">
              <a :href="item.linkUrl">
                <img class="needsclick" @load="loadImage" :src="item.picUrl" />
              </a>
            </div>
          </slider>
        </div>
        <div class="recommend-list">
          <h1 class="list-title">热门歌单推荐</h1>
          <ul>
            <li @click="selectItem(item)" v-for="item in discList" v-bind:key="item.dissid" class="item">
              <div class="icon">
                <img width="60" height="60" v-lazy="item.imgurl" />
              </div>
              <div class="text">
                <h2 class="name" v-html="item.creator.name"></h2>
                <p class="desc" v-html="item.dissname"></p>
              </div>
            </li>
          </ul>
        </div>
      </div>
       <div class="loading-container" v-show="!discList.length">
        <loading></loading>
      </div>
    </scroll>
    <router-view></router-view>
  </div>
</template>

<script type="text/ecmascript-6">
import { getRecommend, getDiscList } from 'api/recommend'
import { ERR_OK } from 'api/config'
import Slider from 'base/slider/slider'
import Scroll from 'base/scroll/scroll'
import Loading from 'base/loading/loading'
import {playlistMixin} from 'common/js/mixin'
import {mapMutations} from 'vuex'

export default {
  mixins: [playlistMixin],
  data () {
    return {
      recommends: [], // 推荐轮播图
      discList: [] // 推荐专辑
    }
  },
  components: {
    Slider,
    Scroll,
    Loading
  },
  created () {
    /* 获取推荐轮播图 */
    this._getRecommend()
    /* 获取推荐专辑 */
    this._getDiscList()
  },
  methods: {
    handlePlaylist (playlist) {
      const bottom = playlist.length > 0 ? '60px' : ''
      this.$refs.recommend.style.bottom = bottom
      this.$refs.scroll.refresh()
    },
    selectItem (item) {
      this.$router.push({
        path: `/recommend/${item.dissid}`
      })
      this.setDisc(item)
    },
    _getRecommend () {
      getRecommend().then(res => {
        if (res.code === ERR_OK) {
          this.recommends = res.data.slider
        }
      })
    },
    _getDiscList () {
      getDiscList().then(res => {
        if (res.code === ERR_OK) {
          this.discList = res.data.list
        }
      })
    },
    loadImage () {
      /* 只要一张轮播图片撑开，就行了，不用每张轮播图片撑开，就重新计算 */
      if (!this.checkloaded) {
        this.checkloaded = true
        this.$refs.scroll.refresh()
      }
    },
    ...mapMutations({
      setDisc: 'SET_DISC'
    })
  }
}
</script>

<style scoped lang="stylus" rel="stylesheet/stylus">
@import '~common/stylus/variable'

.recommend {
  position: fixed
  width: 100%
  top: 88px
  bottom: 0

  .recommend-content {
    height: 100%
    overflow: hidden

    .slider-wrapper {
      position: relative
      width: 100%
      overflow: hidden
    }

    .recommend-list {
      .list-title {
        height: 65px
        line-height: 65px
        text-align: center
        font-size: $font-size-medium
        color: $color-theme
      }

      .item {
        display: flex
        box-sizing: border-box
        align-items: center
        padding: 0 20px 20px 20px

        .icon {
          flex: 0 0 60px
          width: 60px
          padding-right: 20px
        }

        .text {
          display: flex
          flex-direction: column
          justify-content: center
          flex: 1
          line-height: 20px
          overflow: hidden
          font-size: $font-size-medium

          .name {
            margin-bottom: 10px
            color: $color-text
          }

          .desc {
            color: $color-text-d
          }
        }
      }
    }

    .loading-container {
      position: absolute
      width: 100%
      top: 50%
      transform: translateY(-50%)
    }
  }
}
</style>
